Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3e57508b9ebdee…

MALICIOUS

PDF

89.5 KB Created: 2020-12-19 05:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f379100e7fcbb6225d6f613a6ef0591f SHA-1: 37cdc8fe81a9da184b7fc3edd1dab9a68d02db10 SHA-256: ea3e57508b9ebdeed645b9671f71b7e72df86fa79664cca2b610123d94f70dc0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are to PDF files hosted on link farms, suggesting a phishing or content-scraping operation. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous URLs indicate an attempt to distribute or redirect users to other malicious or deceptive content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffnew.ru/strik?utm_term=latin+american+migration+project PDF link annotation
    • https://mirotipobidonep.weebly.com/uploads/1/3/4/9/134902528/3172169.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/9604a35a882e8.pdfIn PDF document text
    • https://motazejiwe.weebly.com/uploads/1/3/4/2/134266269/jarepokuzejo.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/bedon-sebewuletimo-tabebavin.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/rokomogosozoxaz.pdfIn PDF document text
    • https://narukomoforu.weebly.com/uploads/1/3/4/3/134320250/416523.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4e4d1ea4a794d565eb1ca/t/5fc666555147b148040e2377/1606837846514/robot_strike_3d_game_download_uptodown.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc710dc161f8068becc65be/t/5fca2ae4196a600d3c3aabaf/1607084775055/sejejagofisebugazoti.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48f35147b1480429261f/1606371572452/gadoxanobujisarofopive.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/words_with_re_prefix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9e3bda9c57a97be47bf/t/5fc1a75ff3de5e49b5a2c091/1606526816058/befak.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/75966443086.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12265 5060 bytes
SHA-256: a1ac653715a5232b2a122e14077afa8ba1e91879a7f61db64768706bb4925ac4
font_01_sfnt_off0001338d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338D 11420 bytes
SHA-256: f9bb103a09d5ee9fee8384cf1739d461aa33319a754520cf1b4fdb183c437776

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